wifi: mac80211: use safe list iteration in radar detect work
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: use safe list iteration in radar detect work The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to be freed and removed from the list. Guard against this to avoid a slab-use-after-free error.
- Published
- May 28, 2026
- Updated
- Aug 5, 2026
- EPSS
- 0.3% · 19th percentile
- CWE
- CWE-416
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 8.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel6.12 and later · before 6.12.88
- linux linux kernel6.13 and later · before 6.18.30
- linux linux kernel6.19 and later · before 7.0.7
- linux linux kernel7.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 6.12affected
- bca8bc0399ac2efd56e6adbed0307e10125a556c and later · before 887ece6c23b49d02a6678e7a8d5ad213d75883ceaffected · git
- bca8bc0399ac2efd56e6adbed0307e10125a556c and later · before 7577a4b8a10fab45a6ee2045ea038a5adadbb585affected · git
- bca8bc0399ac2efd56e6adbed0307e10125a556c and later · before 120149fb3ebcf674832ca3cafd32bedcdb686ddeaffected · git
- bca8bc0399ac2efd56e6adbed0307e10125a556c and later · before ac8eb3e18f41e2cc8492cc1d358bcb786c850270affected · git
- before 6.12not affected · semver
- 6.12.88 and later · up to and including 6.12.*not affected · semver
- 6.18.30 and later · up to and including 6.18.*not affected · semver
- 7.0.7 and later · up to and including 7.0.*not affected · semver
- 7.1 and laternot affected · original_commit_for_fix
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | kernel | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-devel | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-devel-matched | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-debug-modules-extra | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-devel | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-devel-matched | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-64k-modules-extra | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-abi-stablelists | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-cross-headers | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug-devel | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug-devel-matched | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug-modules | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
| AlmaLinux:10 | kernel-debug-modules-core | before 6.12.0-211.26.1.el10_2 | 6.12.0-211.26.1.el10_2 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 120149fb3ebcf674832ca3cafd32bedcdb686dde | Vendor (CNA) |
| Linux Linux | 7577a4b8a10fab45a6ee2045ea038a5adadbb585 | Vendor (CNA) |
| Linux Linux | 887ece6c23b49d02a6678e7a8d5ad213d75883ce | Vendor (CNA) |
| Linux Linux | ac8eb3e18f41e2cc8492cc1d358bcb786c850270 | Vendor (CNA) |
| almalinux:kernel | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-core | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-core | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-devel-matched | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-core | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-debug-modules-extra | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-devel | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:kernel-64k-devel-matched | 6.12.0-211.26.1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| debian:linux | 6.12.88-1 · Debian:13 | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debuginfo-common-aarch64 | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:kernel-debuginfo-common-ppc64le | 0:6.12.0-211.26.1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| rocky linux:kernel | 0:6.12.0-211.26.1.el10_2 · Rocky Linux:10 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-416 · Use After FreeCVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Root cause
After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.
The bug in code
The whole CWE-416 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);Fixed
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/120149fb3ebcf674832ca3cafd32bedcdb686dde
- git.kernel.org/stable/c/7577a4b8a10fab45a6ee2045ea038a5adadbb585
- git.kernel.org/stable/c/887ece6c23b49d02a6678e7a8d5ad213d75883ce
- git.kernel.org/stable/c/ac8eb3e18f41e2cc8492cc1d358bcb786c850270
- access.redhat.com/errata/RHSA-2026:27288
- access.redhat.com/errata/RHSA-2026:27708
- access.redhat.com/errata/RHSA-2026:27789
- access.redhat.com/errata/RHSA-2026:33215
- access.redhat.com/security/cve/CVE-2026-46166
- bugzilla.redhat.com/show_bug.cgi?id=2482645
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46166.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.